.section{
    width:990px;
    margin:0 auto;
    text-align: center;
    letter-spacing: 0.1em;
}
.first_section li{
    width:247px;
    letter-spacing: 0.5em;
    float:left;
    margin:20px 0;
}
.first_section li img{
    width:247px;
}
.first_section li p{
    height:100px;
    line-height:100px;
    font-size:18px;
}
.second_section li{
    float:left;
    width:495px;
    margin:20px 0;
}
.second_section li:first-of-type{
    height:279px;
    background: #e0e9ec;
    color:#333;
}
.second_section li img{
    width:495px;
}
.second_section li h4{
    font-size: 18px;
    height:38px;
    line-height: 38px;
    margin:20px 0 10px 0;
    color:#111;
    font-weight: 400;
}
.second_section li p:first-of-type{
    font-size: 16px;
}
.second_section li p{
    height:30px;
    line-height:30px;
}
.section_text p{
    line-height:35px;
    font-size:18px;
    color:#333;
}
.third_section{
    margin:20px 0;
}
.third_section .first_img{
    margin-right:20px;
    float: left;
    width:510px;
}
.third_section .first_img img{
    width:510px;
}
.third_section .first_img img:first-of-type{
    margin-bottom: 20px;
}
.third_section .second_img img{
    width:460px;
}
.third_section .second_img img:first-of-type{
    margin-bottom: 20px;
}
.fouth_section .first_img{
    margin-right:20px;
    float: left;
    width:464px;
}
.fouth_section .first_img p{
    height:30px;
    line-height: 30px;
    font-size: 18px;
    margin:10px 0;
}
.fouth_section .first_img img{
    width:464px;
}
.fouth_section .second_img h4{
    height:40px;
    line-height: 40px;
    font-size: 18px;
    padding:20px 0 12px;
}
.fouth_section .second_img p{
    height:30px;
    line-height: 30px;
    margin:5px 0;
}
.fouth_section .second_img img{
    width:506px;
}
.fifth_section{
    margin-bottom: 40px;
}
.fifth_section h2{
    text-align: center;
    font-size: 24px;
    letter-spacing: 0.7em;
    height:40px;
    line-height: 40px;
    margin:20px 0;
}
.fifth_section h4{
    text-align: center;
    letter-spacing: 0.3em;
    height:30px;
    line-height: 30px;
    margin:0 0 20px;
    padding-right:15px;
}
.banner{
    margin-bottom: 15px;
}
.fifth_section .songti{
    font-family: "宋体";
}